Soil Solid Phase Chapter 1

Chapter Sections 1.1 Introduction 1.2 Soil phases 1.3 Soil texture 1.4 Soil mineralogy 1.5 Soil structure 1.6 Summary 1.7 Derivations

1.1 Introduction

1.1 Soil phases 1.1 1.2 1.3 1.4 1.5

1.1 Soil Phases 1.6 1.7 1.8 1.9

Example 1.1

1.3 Soil Texture

1.3 Soil Texture

1.3 Soil Texture

1.3 Soil Texture 1.10 1.11

Example 1.2

2.1 Properties of Bulk Water

Example 1.2

Example 1.2 http://www.physics.uoguelph.ca/tutorials/sig_fig/SIG_dig.htm

1.4 Soil Mineralogy TABLE 1.1 Approximate charge characteristics of soil colloids (Brady and Weil, 2008) Colloid Type CEC AEC cmolc kg-1 Organic matter 200 Smectite 100 Vermiculite 150 Fine-grained micas 30 Chlorite Kaolinite 8 2 Aluminum oxide 4 5 Iron oxide Allophane 15

1.4 Soil Mineralogy 1.12 1.13

1.4 Soil Mineralogy TABLE 1.2 Specific surface area range for selected colloids (Skopp, 2000) Colloid s m2 g-1 Kaolinite 15-20 Illite 80-100 Bentonite 115-260 Montmorillonite 280-500 Crystalline iron oxides 116-184 Amorphous iron oxides 305-412 Organic matter 560-800 TABLE 1.3 Specific surface area for bulk soils (Skopp, 2000) Soil Textural Class s m2 g-1 Sands <10 loams and silt loams 5-20 Clay loams 15-40 Clays >25

Example 1.3

1.5 Soil Structure

1.5 Soil Structure

1.5 Soil Structure: Shape

1.5 Soil Structure: Shape

1.5 Soil Structure: Shape

1.5 Soil Structure: Shape

1.5 Soil Structure: Size & Grade

1.5 Soil Structure: Size

1.5 Soil Structure

1.5 Soil Structure

1.7 Derivations

1.7 Derivations

1.7 Derivations